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Old 06-06-2022, 07:19 PM   #61 (permalink)
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I understand conduction as the propagation of heat, not whether the material expands or not or by how much. An internal combustion engine doesn't need a working fluid that conducts heat because it is heated at every point by the burning fuel inside the engine. With an external combustion engine you need to conduct the heat through the heat exchanger and then into the working fluid.

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Old 06-08-2022, 11:30 PM   #62 (permalink)
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Originally Posted by mpgmike View Post
Isn't that what we want inside a combustion chamber? Doesn't that explanation cover what an Expansion Medium is supposed to do?? Thank you!
As long as there is enough Oxygen to react with the fuel, and the Oxygen contained on water is not useful for that purpose, we couldn't rely so much on water inside the engine, even though some moisture occasionally may lead to a more homogeneous spread of the heat within the combustion chamber under some circumstances.

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